Apparatus for forming cop-type windings

ABSTRACT

A frame comprising an oscillating shaft with means to gradually move the shaft in a vertical direction thereby providing a method of winding thread on a cop tube without imparting undesirable twist to the yarn.

United States Patent Carlos A. Matas Gabalda 33 I avenue, Victor-Hugo, France 789,980

Jan. 9, 1969 Nov. 23, 1971 Inventor Appl. No. Filed Patented APPARATUS FOR FORMING COP-TYPE WlNDlNGS [56] References Cited UNlTED STATES PATENTS 1,163,499 12/1915 Atherton 242/32 1,450,228 4/1923 Rhoades 242/264 2,370,328 2/1945 Schleifer 242/26.1 FOREIGN PATENTS 11,308 1913 Great Britain 242/27 Primary Examiner-Stanley N. Gilreath 7 Claims' 3 Drawn: Attorney-Sherman and Shalloway US. Cl 242/32, 1 242/264 lm,Cl 565 54/36 ABSTRACT: A frame comprising an oscillating shaft with FieldolSeareh 242/27-32, means 10 g du y mo e the shaft in a vertical direction thereby providing a method of winding thread on a cup tube without imparting undesirable twist to the yarn.

nit \IJ PATENTEnuuv 23 Ian SHEET 1 [IF 2 PRlOR ART INVENTOR FIG. 2

Arron HY BACKGROUND OF THE INVENTION n rewinding frames, it is conventional practice to convert cakes, bobbins, etc., into windings of the cop-type, i.e. windings of generally elongated shape having two bevelled faces, without imparting any twist other than that due to overend unwinding.

These frames generally have two faces, so that two lines of vertical windings may be unwound and rewound on two corresponding lines of vertical rotating takeup tubes. During rewinding, a vertical reciprocating movement is imparted to each thread with the aid of two groups of guide arms secured on the central oscillating shaft or rocking member. In order to obtain windings having bevelled ends a slow progressive movement or rotation is imparted to the shaft, superposed on the oscillation.

This system has the disadvantage that it fonns downward windings on one side of the machine and upward windings on the other and, although the result is theoretically the same (with respect to the behavior of the two types of winding during subsequent unwinding for the twisting of the yarn), in practice there are noteworthy differences. Furthermore, this system practically speaking forbids the use of conical supports for the windings on that face of the frame at which the formation is effected downwardly.

SUMMARY OF THE INVENTION The present invention relates to a method and apparatus for forming cop-type windings. Accordingly an object of the present invention is to provide a method of forming cop-type windings on a winding spool in which a yarn guide is oscillated longitudinally of the spool and the axis of oscillation is slowly, progressively moved longitudinally of the spool. The starting point of the stroke is thus displaced progressively and in the same manner on both sides of the frame.

A further object of the invention is to provide apparatus for forming cop-type windings on a winding spool comprising at least one winding spool and at least one guide mounted for oscillation about an axis substantially perpendicular to said winding spool or spools and means for moving the axis of oscillation of said yarn guide or guides substantially parallel to said spool or spools.

Briefiy these objects are achieved by the present invention which provides a double-faced winding frame, for forming cop-type windings on winding spools in two opposite rows, a main shaft mounted substantially perpendicular to said winding spools on two blocks, which shaft is slidable on posts substantially parallel to said winding spools, a pair of screwthreaded rods parallel to said posts each provided with a cooperating nut secured one to each of said blocks, a drive shaft parallel to said main shaft that is driven slowly by a clockwork motion, said drive shaft being geared to rotate each of said screw-threaded rods, a crank arm carried by said main shaft and reciprocated by a drive mechanism including a connecting rod to oscillate said main shaft, and means to adjust the effective length of said connecting rod in synchronism with the rotation of said drive shaft, to alter the amplitude of oscillation of said yarn guides.

In order that the invention may more readily be understood, the following description is given, merely by way of example, reference being made to the accompanying drawings in which:

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows, diagrammatically, the formation of the windings with the conventional rocker member (prior art devices);

FIG. 2 shows, diagrammatically, the formation of the windings with the progressive displacement using apparatus according to the present invention;

FIG. 3 shows, in perspective, one embodiment of doublefaced winding frame according to the invention.

PREFERRED EMBODIMENT Referring to the figures, FIG. 1 shows diagrammatically two winding spools or tubes 1 and 2 disposed oppositely on the two faces of the frame of which only the rocker member is illustrated. The rocker member pivots about an axis 3, and includes two arms 4 and 5, adapted to oscillate through an angle a. The turns of the thread are wound initially on the upper portion of the tube l and on the lower portion of the tube 2. In order to form the complete windings, the rocker member is required to undergo progressive supplementary pivoting, thereby progressively displacing the winding zone downwardly on the tube 1 and upwardly on the tube 2.

FIG. 2 shows, again, in diagrammatic form, two winding spools or tubes 1 and 2, the winding being effected according to the method of the invention. The axis 3 of the shaft is, initially, in the lower position for oscillation through an angle [3. As illustrated, the rocker moves so that the axis 3 ascends gradually towards the position 3' in which the rocker is shown in chain dotted lines, and the windings are formed symmetrically from the bottom upwardly. It would of course be possible to envisage the reverse of this arrangement i.e. to produce windings with increase from the top downwardly.

FIG. 3 illustrates a practical embodiment of winding frame using the arrangement of FIG. 2, this frame having a main shaft 6 adapted to oscillate in the direction of the arrows F- F. It is controlled by a crank arm 7, connected at its other end by a pivot 8 to a nut 9, which is engaged on a screw-threaded connecting rod 10.

The shaft is mounted in two bearings 11 and 12 and carries a plurality arms of which only oppositely extending arms 13 and 14 are illustrated. Each arm has a yarn guide at the free end thereof as shown by the notches or recesses illustrated in FIG. 3. As can be seen, the bearings ll is supported on a slide block 15 and the bearing 12 in a similar slide block 16, the two slide blocks 15 and 16 each being slidable on two vertical posts l7, l8 and 19, 20 respectively. At their upper and lower ends, the pairs of posts are connected by fixed crosspieces 2 l, 22 and 23, 24 respectively.

The slides 15 and 16 carry fixed nuts 25 and 27 engaged on vertical screw-threaded rods 26 and 28.

By means to be described hereinbelow, rotation is imparted to the screw-threaded rods 26 and 28 to effect vertical displacement of the slides 15, 16 with the bearings 11, 12 of the shaft 6. Simultaneously, the rotation of the screw-threaded rod 10 in the fixed nut 9 modifies the effective length of the connecting rod 10 and, if the two screw threads correspond, the oscillation 5 will always be symmetrical relatively to the momentary diametral plane of the axis of the shaft 6.

The screw-threaded rods 26, 28 and the screw-threaded connecting rod 10 are driven in the following manner. A rotary cam 31 drives a reciprocating slide 32 sliding on two fixed parallel rods 33, 34. Articulated to the slide 32 is a screwthreaded lever 35, the articulation being efiected by a threaded head 36.

Also attached to the lever 35 is a mechanism 37 which pivots about a longitudinal shaft 30. The lever 35 imparts to the mechanism 37 an oscillating movement which is transmitted to the connecting rod 10 and then to the arm 7, which oscillates the shaft 6.

F urthennore, a clockwork motion E imparts a slow rotation to the shaft 30, which is transmitted, via gears 38 and 39, to the screw-threaded rod 26 and, by means of gears 40, 41 to the screw-threaded rod 28, the two screw-threaded rods 26, 28 displacing the slides 15 and 16 carrying the oscillating shaft 6. At right angles to the mechanism 37, shaft 30 carries a pinion 42 acting on a pinion train 43, 44, 45 carried by the mechanism 37 and slowly rotates the screw-threaded connecting rod 10, this producing a slow modification in the length of the connecting rod due to screwing in the nut 9. This slow modification of the length of the connecting rod 10 is, of course, in synchronism with the slow, progressive displacement of the oscillating shaft 6.

The described gearing provides vertical movement G by the rotation in direction H. It is possible to provide a mechanism for the rapid return of the clockwork motion E, for the purpose of rapidly restoring the device to its starting position, when the cops are doffed at the end of unwinding.

The known means used for this purpose have not been shown. The oscillation amplitude of the oscillating shaft may be modified by means of the head 36. The rotation of the lever 35 enables the effective length thereof to be modified. Similarly, FIG. 3 does not illustrate the two winding spools or tubes, which are disposed vertically, one on either face of the main shaft 6, adjacent the yarn guides on the ends of arms l3, 14.

The invention is not to be limited to the particular forms illustrated herein as they are given for illustrative purposes only. The invention which is to be protected is limited only by the appended claims.

What is claimed is:

1. Apparatus for forming cop-type windings on winding spools, said apparatus comprising a pair of winding spools having longitudinal axes disposed in parallel, an oscillating shaft having a longitudinal axis disposed substantially perpendicular to the longitudinal axes of said winding spools, a pair of yarn guides mounted on said shaft for oscillation about the longitudinal axis thereof, means connected with said shaft to oscillate said shaft and effect said oscillation of said yarn guides, and means for moving said shaft in a direction substantially parallel to the longitudinal axes of said winding spools.

2. Apparatus according to claim 1 wherein said moving means includes a pair of movable blocks slidable in a direction substantially parallel to the longitudinal axes of said winding spools, and said shaft is supported by said movable blocks.

3. Apparatus according to claim 2 wherein said moving means includes a pair of parallel screw-threaded rods each passing through a collaborating nut secured to one of said blocks and a drive shaft disposed parallel to said shaft and geared to rotate each of said screw-threaded rods.

4. Apparatus according to claim 2 wherein said oscillating means includes a crank arm carried by said shaft and a drive mechanism including a connecting rod connected with said crank arm provided with reciprocating movement to reciprocate said crank arm and oscillate said shaft.

5. Apparatus according to claim 4 wherein said oscillating means includes means for adjusting the effective length of said connecting rod to maintain constant the amplitude of oscillation of said yarn guides as said shaft is moved.

6. Apparatus according to claim 5 wherein said connecting rod is screw-threaded and said adjusting means includes means for rotating said connecting rod about its axis to adjust the position thereon of a nut pivoted to said crank arm.

7. Apparatus according to claim 4 wherein said oscillating means includes means for adjusting the amplitude of reciprocating movement of said connecting rod. 

1. Apparatus for forming cop-type windings on winding spools, said apparatus comprising a pair of winding spools having longitudinal axes disposed in parallel, an oscillating shaft having a longitudinal axis disposed substantially perpendicular to the longitudinal axes of said winding spools, a pair of yarn guides mounted on said shaft for oscillation about the longitudinal axis thereof, means connected with said shaft to oscillate said shaft and effect said oscillation of said yarn guides, and means for moving said shaft in a direction substantially parallel to the longitudinal axes of said winding spools.
 2. Apparatus according to claim 1 wherein said moving means includes a pair of movable blocks slidable in a direction substantially parallel to the longitudinal axes of said winding spools, and said shaft is supported by said movable blocks.
 3. Apparatus according to claim 2 wherein said moving means includes a pair of parallel screw-threaded rods each passing through a collaborating nut secured to one of said blocks and a drive shaft disposed parallel to said shaft and geared to rotate each of said screw-threaded rods.
 4. Apparatus according to claim 2 wherein said oscillating means includes a crank arm carried by said shaft and a drive mechanism including a connecting rod connected with said crank arm provided with reciprocating movement to reciprocate said crank arm and oscillate said shaft.
 5. Apparatus according to claim 4 wherein said oscillating means includes means for adjusting the effective length of said connecting rod to maintain constant the amplitude of oscillation of said yarn guides as said shaft is moved.
 6. Apparatus according to claim 5 wherein said connecting rod is screw-threaded and said adjusting means includes means for rotating said connecting rod about its axis to adjust the position thereon of a nut pivoted to said crank arm.
 7. Apparatus according to claim 4 wherein said oscillating means includes means for adjusting the amplitude of reciprocating movement of said connecting rod. 